My locks are not currently working on my 05 S500 and I was wondering if there is any way to test the vacuum pump?? I can pop the trunk and when i press the lock or unlock button on the keypad i hear a clicking but no vac motor running. Is the vac pump bad?? Is there a relay for the pump itself that could be bad? My trunk release is also not working nor the trunk assist.(i have to open the trunk with a key) THanks for your help!!